EP1584149B1 - Procede de transmission sur onde commune et systeme de transmission sur onde commune associe - Google Patents

Procede de transmission sur onde commune et systeme de transmission sur onde commune associe Download PDF

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Publication number
EP1584149B1
EP1584149B1 EP04702678.6A EP04702678A EP1584149B1 EP 1584149 B1 EP1584149 B1 EP 1584149B1 EP 04702678 A EP04702678 A EP 04702678A EP 1584149 B1 EP1584149 B1 EP 1584149B1
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Prior art keywords
transmission
transmitter
transmitters
block
data
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EP04702678.6A
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German (de)
English (en)
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EP1584149A1 (fr
Inventor
Gerd Bumiller
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IAD Gesellschaft fuer Informatik Automatisierung und Datenverarbeitung mbH
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IAD Gesellschaft fuer Informatik Automatisierung und Datenverarbeitung mbH
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2625—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using common wave

Definitions

  • the invention relates primarily to a method for synchronous transmission (preamble of claim 1) and a synchronous transmission system therefor (claim 5).
  • Synchronous transmission systems in particular synchronous radio systems, have been known for a long time.
  • a common wave radio network with fixed and mobile radio stations, as well as relay stations, their transmitters and possibly receivers in common wave mode for radio coverage of a large area are known.
  • the radio network has a hierarchical structure with several levels of fixed centers. From each control center on one level, star-shaped connections lead to several control centers on the next subordinate level.
  • the relay points are each assigned to a control center at the lowest level by means of star-shaped connections.
  • the transit times or the amplitude and phase frequency response from the centers of one level to the centers of the next subordinate level are the same, so that all relay points in the large area transmit synchronously.
  • the relay points have an additional component, which, on request from a mobile radio station, automatically gives an operating channel assignment to a radio network serving the area in question.
  • the mobile radio stations contain a module for sending a digital operating channel request telegram, as well as for evaluating, storing and displaying several operating channel assignments. The mobile subscriber selects one of the displayed operating channel numbers, sets them on the radio and. opens the conversation on the company channel.
  • each control center has a frequency standard, so that adjacent supply areas can be operated in quasi-synchronous single-wave operation in relation to one another.
  • a main control center is provided, which transmits modulation signals to the various control centers for largely simultaneous and phase-locked transmission by the transmitters. The maturity differences within the region (and also within several regions) must be compensated for.
  • a high-frequency synchronization of the various control centers from the main control center does not take place, or at most occasionally, for example daily, because the control centers contain long-term oscillators as frequency standards in order to achieve quasi-synchronous single-wave radio operation.
  • the OFDM method O rthogonal F requency D ivision M ultiplexing
  • DAB digital audio broadcasting standard
  • DTTB Digital Terrestrial Television Broadcasting
  • symbol streams that are input serially are divided into a predetermined unit block.
  • the divided symbol streams of each unit block are converted into N parallel symbols.
  • N parallel symbols are combined by multiplexing and addition by a plurality of subcarriers in accordance with an inverse fast Fourier transform algorithm IFFT (I nverse F ast F individual Fourier T ransformation) having respective different frequencies, and the so-added data is transmitted over the channel .
  • IFFT inverse fast Fourier transform algorithm
  • N parallel symbols are defined as a unit block, and each subcarrier of the unit block has an orthogonality (for both successive and spectrally adjacent symbols) with respect to ISI (intersymbol interference) and ACI (adjacent channel interference).
  • the OFDM method can reduce an inter-symbol interference (ISI) caused by multi-path fading in a received signal by maintaining the same symbol transmission rate and changing the symbol period the number of subchannels (N) increased.
  • ISI inter-symbol interference
  • guard intervals a protection interval
  • a specially designed system for digital information transmission with a multi-carrier transmission method is known from the DE 196 38 654 A1 known to the applicant.
  • This system has a device for generating a transmission signal with a module for carrier modulation, to which channel-coded parallel code symbols of an input signal are fed and in which the subcarriers are assigned the code symbols by means of differential coding in the frequency direction.
  • An error coding and / or nesting module is connected upstream of the module for carrier modulation and a parallel / serial converter is connected downstream.
  • means for generating synchronization information according to a preamble for each generated block of code symbols and a link for generating a transmission pause between successive blocks, ie independent data packets, are provided on the transmission side.
  • the DE 196 38 654 A1 assigning the binary code symbols to the subcarriers by means of differential coding in the direction of the subcarriers, that is to say in the frequency direction; in the prior art, however, this is done by differential modulation in the time direction.
  • a channel estimate can be dispensed with, so that the transmission of the individual packets takes place independently of one another.
  • carrier phase synchronization can furthermore be dispensed with entirely and the permissible tolerances of the sampling phase synchronization are high.
  • TDM signals are transmitted in the direction of point-to-multipoint from a head station and in the opposite direction from individual multipoint stations in burst-like fashion, which signals are combined at one or more splitters to form a TDMA signal for the head station.
  • bursts These blocks of user data, which are generally referred to as bursts, are not exactly synchronous with one another and arrive in the receiver after different transit times with different signal amplitudes / clock phases.
  • Each data burst is preceded by guard and run-in bits, the guard bits preventing two data bursts from overlapping and the run-in bits being used for synchronization in the receiver. Since the distance between the control center and the subscriber station is unknown, each subscriber station must be calibrated during commissioning, for which purpose measurement data (data bursts with synchronous or. In a measurement window of the available data transmission frame asynchronous data) are sent.
  • the burst-like signals of the multipoint stations are combined by a splitter into a frame which is provided in one part for synchronous data and in another part for optionally asynchronous user data or measurement data.
  • a communication system for data transmission in a meshed network using a method with multi-carrier transmission in which the signal transmission in the direction of point-to-multipoint by TDM signals and in the direction of multipoint-to-point by burst signals.
  • at least one network branching and / or repeater device is provided in the network, which has a control device connected to a block synchronization and burst detection device, which combines bursts into a TDMA signal and then simultaneously transmits again in the same frequency range on the same medium.
  • this data is superimposed in a simple manner and a synchronous wave is created which increases the reliability of the transmission and at the same time saves transmission time compared to the individual transmission of the data.
  • this communication system sends the bursts on the same medium on which they were received.
  • the combination of OFDM / TDM methods results in higher band efficiency and a reduction in intersymbol interference, while at the same time optimizing the protection interval and further improving synchronization. In comparison to TDM procedures, it is not necessary to carry out runtime calculations in the central office and to make a correction to compensate for runtime fluctuations.
  • the decision for the repeaters to be used, ie for the route, can be made, for example, via a so-called routing table, as is the case with the radio network according to DE 33 37 648 A1 is described.
  • this can require very inefficient try and error routing, where the messages are sent to repeaters / mobile stations which do not receive the messages or do not continue in the right direction can send.
  • a repeater for filling coverage gaps in a cellular radio network is known.
  • Such repeaters are often used to expand radio coverage, e.g. B. used in tunnels, large buildings or to supply areas in the radio shadow, and whenever the installation of a base station is too expensive.
  • the principle of conventional repeaters is - just like the repeater according to GB 2 260 467-A - The bidirectional amplification of the radio signals in the uplink and downlink direction, the radio signals being transmitted again at the same frequency on which they were received.
  • the downlink signal that is to say the signal coming from the base station of the radio network, is received with a connection antenna, amplified in the repeater, possibly filtered and transmitted to the mobile station via a supply antenna.
  • the uplink signal coming from the mobile station is received with the supply antenna, amplified in the repeater, possibly filtered and transmitted to the base station via the connection antenna.
  • the two repeater branches are usually coupled to the antennas using duplex filters. With the band-selective repeater according to the GB 2 260 467-A an entire frequency band with several channels is filtered and amplified at an intermediate frequency. This requires a high selectivity of the filtering in order to avoid interference at the band boundaries and feedback via the two antennas.
  • the repeater may use the same frequency as the repetition original transmitter, however there is no transmission with a single wave, ie several repeaters do not send the same signal on the same frequency at the same time. Instead, each repeater adds to the subject of the GB 2 260 467-A a separate, repeater-specific header information that contains at least the repeater ID or the location. In this way, the repetitions of different repeaters differ from one another, so that simultaneous transmission in the sense of the same wave is not meaningfully possible, since if the signals of several repeaters were superimposed on one receiver, they would impair or destroy one another.
  • a communication system with a cable network whereby on the one hand a connection to the Internet via a headend (headend) and on the other hand a connection to the mobile subscribers assigned to a particular cell can be established via a connection device (hub) and an antenna array (antenna node).
  • the communication system of the EP 1 248 412 A2 a network with a star-shaped topology, in which the data packets or television signals of the cable network arriving via the headend from the Internet are distributed via the connection device to the mobile subscribers connected via a radio link and with the router for the switched connection and translation of the various network protocols required are.
  • the known systems require complex facilities for synchronization and for determining the route when establishing a connection, in particular in order to to avoid that synchronicity is lost during operation and to enable reconfiguration within the network in the event of faults. Since a flexible network structure is of great benefit and requires a high cost, the functional reliability of message transmission systems has not been significantly improved. This is particularly important because both the telecommunications industry and the computer industry can be seen as extremely progressive, development-friendly industries that quickly pick up improvements and simplifications and put them into practice.
  • the invention is based on the object of designing it in such a way that rapid and reliable transmission of the message is ensured even in the case of highly dynamic changes in the transmission paths.
  • the method according to the invention for synchronous wave transmission has the advantage that it can also be used in so-called "ad-hoc networks".
  • wireless networks there can be highly dynamic changes in the transmission paths and thus frequent changes in the routing paths.
  • a lot of channel resource is lost in conventional ad hoc networks for the determination and constant updating of the routing tables required for this.
  • This is not the case with the inventive method for single-wave transmission since all single-wave transmitters that receive a packet repeat this.
  • no administrative effort is required to determine which single-frequency transmitter / repeater should best repeat a packet at what time.
  • the single-wave transmitters / repeaters result "automatically" and are not addressed, although it is quite possible that the data now sent differ from the received data.
  • the method according to the invention for synchronous wave transmission has the advantage that the block identification quasi provides addressing information, namely whether the telegram has already been received or not. Participants who "hear” such a telegram again do not become active and no longer send this telegram, so that closed loops are reliably avoided. This can create a so-called “saturation network".
  • the "saturation network” does not require more time or channel resource than previously an optimal routing to the target point in the prior art. Because the repetition of a telegram by all participants who receive it correctly has the consequence that the optimal repeater is always included.
  • the synchronous transmission system according to the invention can be constructed inexpensively, can be coupled / integrated to existing message transmission systems, does not require a protocol converter or memory for network management or routing tables and ensures that network operations are maintained even in the event of a local network fault.
  • the signal transmission to the subsequent transmitters takes place in time-division multiplex.
  • This development of the invention has the advantage that an optimal utilization of the channel capacity can be realized.
  • the OFDM transmission method receives its high resistance to multipath propagation through the massive parallel transmission of the data. This means that the evaluation of the data can only begin after the complete block has been received. Due to the processing time of a packet in the different levels (physical layer and higher protocol layers), a single-frequency transmitter / mobile station cannot immediately answer or repeat the next time slot after receiving a packet, but one or more time slots elapse in which this has not yet happened is possible.
  • the calculation of the FFT and the strong channel coding result in significant run times in the single-wave transmission system according to the invention until the data can be evaluated.
  • the complete data must be transferred to the transmission system well before transmission, so that it is available for transmission in time after the encoding, modulation and IFFT calculations.
  • the time period between the receipt of an OFDM symbol and the sent response can be up to a duration of several OFDM symbols.
  • the time axis on the transmission medium is therefore divided into several independent, logical channels, with different time slots being assigned to each channel.
  • a time slot has the size of an OFDM symbol including the preambles and a protective distance.
  • a packet received should be answered immediately within a logical channel.
  • Logical channels can now also be implemented in the other two time slots are mutually independent.
  • the assignment to the individual logical channels can be done using different preambles or within the protocol. If it is cheaper by the organization, a different number (for example four or two) of independent logical channels can also be set up.
  • the data sent by the subsequent transmitters as a repetition can differ from the received data.
  • a counter is integrated in the transmission data from the initiating transmitter and from all subsequent transmitters, which is modified by the subsequent transmitter before the data is retransmitted and which allows the number of block repeats already transmitted and / or to determine the maximum number of block repetitions to be sent at the receiver.
  • a counting process can advantageously be provided. It is preferably provided to integrate a counter in the packet, which is incremented, for example, with each repetition, as a result of which the number of repetitions already sent can be determined at the receiver.
  • a counter can limit the number of repetitions to a number that makes sense for this communication request, in order to then release the medium again. The control device in the receiver can therefore decide whether the packet should be sent again by comparing it with the predefinable maximum number of repetitions.
  • control device in the transmitter can also set the counter to the maximum desired number of repetitions, for example, and the control device in the receiver decrements this and repeats the packet as long as the counter is not already at zero. Since the distinguish between data sent as a repetition and the data received, it only has to be ensured that the data sent in the same time slot in a single wave are identical from all transmitters.
  • the transmitters or part of the transmitters are mobile stations.
  • This embodiment of the invention has the advantages that a flexible communication system can be set up, in which reconfigurations are superfluous and a favorable ratio between transmission capacity and transmission rate is achieved. Due to the rapid transmission in the radio system due to the quasi-synchronous single-wave operation in the entire coverage area, the influence of access destruction can be neglected.
  • each transmitter in the single-wave transmission system is either an initiating transmitter or a repeater as a subsequent single-wave transmitter.
  • Single-wave transmission system shown in particular a single-wave radio system, has several, in the transmission area, in particular Radio area, spatially distributed single-wave transmitters, which are operated in time-division multiplexing. If a participant in the single-frequency radio system / network has a transmission request and is allowed to transmit it, it sends its message with a clear block identification as a broadcast in all directions. Since no other participant has any knowledge of the data at this point in time, this is still done without a synchronous wave. Each time frame begins with a frame synchronization by means of which all single-frequency transmitters, in particular mobile stations, are synchronized in time, which can receive the respective single-frequency transmitter / mobile station directly.
  • the transmission signal is supplemented by a block identification and the radio signal formed in this way is emitted by the single-frequency transmitter. Since it is not important for the receiving single-frequency transmitter / mobile station to synchronize with a specific single-frequency transmitter / mobile station, the single-wave transmitter / mobile stations can transmit this frame synchronization at the same time.
  • a control device CU which is connected to a block detection device BE and which controls the synchronization S of the blocks and the renewed transmission of the received radio signal in synchronous single-wave operation, is provided in all single-wave transmitters / subscribers.
  • Some of the single-wave transmitters / mobile stations thus receive the frame synchronizations, which are partially overlaid with a time offset.
  • this time offset is not a nuisance in the receiver.
  • all of these single-frequency transmitters / mobile stations send the data (control data and user data) which they previously received.
  • some new single-wave transmitters / mobile stations receive the data overlaid with a time offset.
  • the advantages of the method according to the invention for single-wave transmission or single-wave transmission system, in which the single wave is used in (almost) all time slots, are on the one hand the time saved by the message being spread in different directions as in a pyramid scheme and many transmitters transmitting in the same time slot and thus jointly use the channel resource for only one message and, on the other hand, the signal-to-noise ratio gain through the superimposition of the various transmission signals.
  • By changing the guard interval a flexible adaptation to the permissible time difference in the quasi-meshed network can take place, so that a good compromise regarding ISI and ACI can be achieved.
  • the influence of distance-dependent disturbances, such as jitter is of little importance in the single-wave transmission system according to the invention due to the multiple reception of identical information.
  • the single-frequency transmitters / participants / repeaters result automatically (after evaluating the block identification and in accordance with these) and are not addressed (i.e. the block identification corresponds to an addressless command that is stored and passed on at the same time, which means that the single-frequency transmitter / participant / repeater responds to the command in a subscriber-specific manner responds, the performance is increased and the information transfer is designed efficiently).
  • the SFN principle is used for all data in the single-frequency transmission system according to the invention (the sending of a new packet always begins after the Broadcast principle, the subsequent repetitions are based on the SFN principle, see FIG. 1 ) and there can be several "repeater levels".
  • a master can be provided, wherein a time slot can be provided in the time frame for signaling a transmission request to the master, who then grants transmission rights.
  • the participants compete for random access, such as Slotted Aloha.
  • communication between the master and the single-frequency transmitter / mobile station takes place via the reserved time slots.
  • the data interface itself essentially contains the following functional units: Multiplexer, demultiplexer, data flow control and interface adapter.
  • FIG. 2nd An embodiment of the repeater / single-frequency transmitter according to the invention is shown in FIG. 2nd shown.
  • the receiving branch has a filter / amplifier FV1, an analog-digital converter AD, a digital signal processor DSA1, an FFT transformer FFT, a demodulator D and a decoder / error detection DEF.
  • An encoder E, a modulator M, an inverse FFT transformer IFFT, a digital signal processor DSA2 (digital mixer, digital filter, band limiter, undersampler), a digital-to-analog converter DA and a filter / amplifier FV2 are located in the transmission branch.
  • the control device CU which can also take over the functions block detection and switching (depending on the block identification or addressless commands), is connected both to the encoder E of the transmission branch and to the decoder / error detection DEF of the reception branch and is available for synchronization (via S ) in connection with the respective digital signal processing DSA1 and DSA2.
  • the coupling of the two repeater branches to the coupling unit / antenna A is preferably carried out without a duplex filter, namely by means of switch U.
  • the method according to the invention for synchronous wave transmission or Commonwave transmission system is particularly suitable for wireless ad hoc networks with mobile subscribers, where there are highly dynamic changes in the transmission paths. Due to the transparent transmission according to the invention, this is also suitable for a higher bit rate data service without the use of modems (data format conversion), since the application and protocol layers of the data service are passed through and are thus virtually integrated into the protocol layers of the mobile radio data service.
  • the single-wave transmission system according to the invention can be used as a radio LAN (Local Area Network) for a high-bit-rate and packet-oriented data connection, for example to a personal computer.
  • LAN Local Area Network

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (7)

  1. Un procédé de transmission directe d'ondes dans un système de transmission à ondes directes comprend une pluralité d'émetteurs qui sont disposés de manière répartie dans l'espace dans la zone d'alimentation et qui comportent un dispositif de commande (CU),
    • dans lequel les données de transmission à transmettre sont insérées dans une trame de temps, commençant par une synchronisation de trame, afin de compléter une identification de bloc et le signal transmis ainsi formé est transmis depuis l'émetteur d'initiation sous la forme d'une diffusion ou d'un message dans toutes les directions par l'intermédiaire d'une unité de couplage ou d'une antenne (A),
    • dans lequel dans tous les émetteurs temporellement ultérieurs recevant le signal de transmission, le dispositif de commande (CU) connecté à un dispositif de détection de bloc (BE) côté réception évalue l'identification de bloc au moins après qu'un bloc a déjà été reçu ou non, et
    • dans lequel le dispositif de commande (CU), qui est connecté à un processeur de signal numérique (DSP1) et un processeur de signal (DSP2) agencé dans la branche de réception, commande la synchronisation des signaux de transmission, dans lequel l'axe temporel sur le trajet de transmission étant divisé en une pluralité de canaux logiques indépendants, dans lequel différents intervalles de temps étant attribués à différents canaux logiques, et dans lequel la transmission renouvelée ayant lieu dans la prochaine tranche de temps suivante du canal logique dans lequel le signal de transmission a été reçu, de telle sorte qu'une opération d'onde directe quasi-synchrone est mise en œuvre et chaque émetteur ne transmet pas un bloc qui a déjà été reçu.
  2. Le procédé selon la revendication 1, caractérisé en ce que la transmission de signaux vers les émetteurs temporellement ultérieurs a lieu dans le multiplexage par répartition dans le temps.
  3. Le procédé selon les revendications 1 ou 2, caractérisé en ce que les données transmises en répétition par les émetteurs temporellement successifs diffèrent des données reçues associées.
  4. Le procédé selon la revendication 1, caractérisé en ce qu'un compteur est intégré dans les données de transmission par l'émetteur initiateur et par tous les émetteurs temporellement consécutifs, lequel compteur est modifié par l'émetteur suivant respectif avant sa transmission renouvelée des données et qui permet de déterminer le nombre de répétitions de blocs déjà transmises et/ou le nombre maximal de répétitions de blocs restant à envoyer au récepteur.
  5. Un système de transmission à ondes communes comprenant:
    • une pluralité d'émetteurs disposés de manière spatialement répartie dans la zone d'alimentation, dans lequel un émetteur initiateur étant conçu de telle sorte que des données de transmission sont insérées dans une trame de temps, commençant par une synchronisation de trame, afin de compléter une identification de bloc et que le signal transmis ainsi formé est transmis sous la forme d'une diffusion ou d'un message dans toutes les directions par l'intermédiaire d'une unité de couplage ou d'une antenne (A),
    • un dispositif de commande (CU), qui est disposé dans tous les émetteurs côté réception et est relié à un dispositif de détection de bloc (BE),
    • une branche de réception connectée au dispositif de commande (CU) et ayant un filtre/amplificateur (FV1), un convertisseur analogique-numérique (AD), un conditionnement de signal numérique (DSP1), un transformateur FFT (FFT), un démodulateur (D) et un décodeur/détection d'erreur (DEF),
    • une branche de transmission connectée au dispositif de commande (CU) et ayant un encodeur (E), un modulateur (M), un transformateur FFT inverse (IFFT), un conditionnement de signal numérique (DSP2), un convertisseur numérique-analogique (DA) et un filtre/amplificateur (FV2),
    • l'antenne ou l'unité de couplage (A) de l'émetteur respectif et
    • un commutateur (U), qui est relié à l'antenne ou à l'unité de couplage (A) et à la branche de réception et à la branche de transmission,
    • le dispositif de commande (CU) est configuré pour détecter si un bloc a déjà été reçu ou non et est configuré pour se synchroniser (S) le signal d'émission, dans lequel l'axe temporel sur le trajet de transmission étant divisé en une pluralité de canaux logiques indépendants, dans lequel différents intervalles de temps étant attribués à différents canaux logiques, et dans lequel le dispositif de commande étant conçu pour commander la transmission renouvelée dans la tranche de temps successive suivante du canal logique, dans lequel le signal de transmission a été reçu, de telle sorte qu'une opération d'onde directe quasi-synchrone est mise en œuvre, et chaque émetteur est conçu de telle sorte que s'il a déjà reçu un bloc, ne transmet pas le bloc.
  6. Le système de transmission à ondes communes selon la revendication 5, caractérisé en ce que les émetteurs ou une partie des émetteurs sont des stations mobiles.
  7. Le système de transmission à ondes communes selon la revendication 5, caractérisé en ce que chaque émetteur dans le système de transmission à ondes directes est un émetteur initiateur ou soit comme un émetteur à ondes directes suivant chronologiquement est un répéteur.
EP04702678.6A 2003-01-16 2004-01-16 Procede de transmission sur onde commune et systeme de transmission sur onde commune associe Expired - Lifetime EP1584149B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10301556A DE10301556B4 (de) 2003-01-16 2003-01-16 Verfahren zur Gleichwellenübertragung und Gleichwellenfunksystem oder drahtgebundenes Gleichwellenübertragungssystem mit räumlich verteilt angeordneten Gleichwellensendern
DE10301556 2003-01-16
PCT/EP2004/000302 WO2004064276A1 (fr) 2003-01-16 2004-01-16 Procede de transmission sur onde commune et systeme de transmission sur onde commune associe

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EP1584149A1 EP1584149A1 (fr) 2005-10-12
EP1584149B1 true EP1584149B1 (fr) 2020-05-27

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EP2258057A1 (fr) * 2008-04-01 2010-12-08 Siemens Aktiengesellschaft Procédé et dispositif d'adaptation d'au moins une liaison de communication et système comportant un dispositif de ce type
EP2182653A1 (fr) 2008-10-31 2010-05-05 Nokia Siemens Networks GmbH & Co. KG Procédé de transmission de données dans un réseau radio, réseau radio et station de réception

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WO2004064276A1 (fr) 2004-07-29
EP1584149A1 (fr) 2005-10-12
DE10301556A1 (de) 2004-08-19

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